Claude Sonnet 4.5 vs DeepSeek R1
Compare Claude Sonnet 4.5 by Anthropic against DeepSeek R1 by DeepSeek, in 9 community votes, claude sonnet 4.5 wins 86% of head-to-head duels, context windows of 200K vs 128K, tested across 43 shared challenges.
Reasoning: Claude Sonnet 4.5 wins 67% of votes
Image Generation: Claude Sonnet 4.5 wins 100% of votes
Web Design: Claude Sonnet 4.5 wins 100% of votes
Our Verdict
Claude Sonnet 4.5Winner
DeepSeek R1Runner-up
Pick Claude Sonnet 4.5. In 9 blind votes, Claude Sonnet 4.5 wins 86% of the time. That's not luck.
Claude Sonnet 4.5 particularly excels in Image Generation, Web Design, Reasoning. DeepSeek R1 is 6.8x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
Claude Sonnet 4.5
Input
$3.00
Output
$15.00
DeepSeek R1
Input
$0.55
5.5× cheaper
Output
$2.19
6.8× cheaper
DeepSeek R1 is cheaper on both — 5.5× input, 6.8× output
Writing DNA
Style Comparison
Similarity
44%
Claude Sonnet 4.5 uses 10.5x more emoji
Claude Sonnet 4.5
DeepSeek R1
64%Vocabulary62%
94wSentence Length15w
0.48Hedging0.52
4.9Bold8.0
8.0Lists5.7
0.45Emoji0.04
1.91Headings0.62
0.07Transitions0.28
Based on 20 + 22 text responses
Research
What we learned reading every model
FAQ
